Fix GeoJSON loading.
Fix GeoJSON loading, and more.

And more:
- Support GeoJSON with a CRS of type 'name' instead of type 'EPSG'.
- Treat EPSG:4283 as equivalent to 4326.
- Use Cesium's new styling for the feature info panel (different style for
alternating rows).
Handle SA GeoJSON with mysterious extra envelope around it.
Merge pull request #283 from NICTA/geojson

Fix GeoJSON loading, and more.